Home / 13,320.40-19,951.80-11,861.20

Finding the Fourth Proportional to 13,320.40, 19,951.80 and 11,861.20

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Solution

The fourth proportional to 13,320.40, 19,951.80 and 11,861.20 is: 17,766.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.40 : 19,951.80 = 11,861.20 : x
  2. Step 2: Convert to fraction form
    13,320.40/19,951.80 = 11,861.20/x
  3. Step 3: Cross multiply
    13,320.40x = 19,951.80 × 11,861.20
  4. Step 4: Simplify right side
    13,320.40x = 236,652,290.16
  5. Step 5: Solve for x
    x = 236,652,290.16/13,320.40
  6. Step 6: Final answer
    x = 17,766.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.